Irish domestic economy grows 2.3% in third quarter, GDP remains elevated

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Irish modified domestic demand up 4.1% year-to-date

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Jump in investment by domestic firms drives Q3 growth

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Irish GDP remains elevated at 15.8% for first nine months

(Adds detail in paragraphs 4-9)

By Padraic Halpin

DUBLIN, Dec 4 (Reuters) - Ireland's domestic economy grew by 2.3% in the third quarter compared to the previous three months, while the more volatile gross domestic product (GDP) was 0.3% lower following an early year surge, Central Statistics Office (CSO) data showed.

With Ireland's large multinational sector often distorting GDP, officials prefer to use modified domestic demand (MDD) to gauge the strength of the economy and the quarterly growth was almost entirely driven by an 8.3% jump in modified investment.

MDD was up 4.1% year-to-date while GDP, which has at times diverged sharply from activity in the domestic economy in recent years, was 15.8% higher for the first nine months of the year thanks to a huge increase in pharmaceutical exports to the U.S.

More than a dozen of the world's biggest pharmaceutical multinationals have plants in Ireland, where many make active ingredients for the U.S. market.

While some reported

stocking up

ahead of threatened tariffs on the sector earlier in the year, inflating the first quarter Irish and

euro zone

GDP figures, exports from Ireland to the U.S. jumped again in September to keep GDP at an elevated level.

Personal consumption, while up a solid 2.9% in 2025, was weaker from July to September and rose by just 0.1% with spending on services flat and slightly higher for goods.

The jump in modified investment was due to an increase in the purchasing of software and aircraft, and enhanced research and development activity by domestic companies, the CSO said.

Irish airline Ryanair, Europe's largest by passenger numbers, reported

a quickening

of the delivery of new aircraft from Boeing (BA) during the third quarter, likely adding to the jump in investment in the economy.

Ireland's finance ministry in October increased its MDD growth forecast for the year to 3.3% from 2% previously, after the economy shrugged off any material impact from increased U.S. tariffs on the European Union. (Reporting by Padraic Halpin; editing by William James and Ed Osmond)